From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Thomas Zimmermann" <tzimmermann@suse.de>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"Michal Suchánek" <msuchanek@suse.de>
Cc: Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
Sam Ravnborg <sam@ravnborg.org>, David Airlie <airlied@linux.ie>,
Michael Ellerman <mpe@ellerman.id.au>,
Helge Deller <deller@gmx.de>,
Javier Martinez Canillas <javierm@redhat.com>,
DRI Development <dri-devel@lists.freedesktop.org>,
Paul Mackerras <paulus@samba.org>,
Maxime Ripard <maxime@cerno.tech>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH 2/2] drm/tiny: Add ofdrm for Open Firmware framebuffers
Date: Fri, 27 May 2022 10:17:50 +1000 [thread overview]
Message-ID: <23740c1edd7b080133ab852cd8e3de89fd7c9aae.camel@kernel.crashing.org> (raw)
In-Reply-To: <a077bc25-03b3-f8bd-0138-a175a2864943@suse.de>
On Wed, 2022-05-25 at 18:45 +0200, Thomas Zimmermann wrote:
>
> > The palette handling is useful when using a real Open Firmware
> > implementation which tends to boot in 8-bit mode, so without palette
> > things will look ... bad.
> >
> > It's not necessary when using 16/32 bpp framebuffers which is typically
> > ... what BootX provides :-)
>
> Maybe the odd color formats can be tested via qemu.
>
> I don't mind adding DRM support for BootX displays, but getting the
> necessary test HW with a suitable Linux seems to be laborious. Would a
> G4 Powerbook work?
My point was that it's the non-BootX case that cares about the palette
hacks :-)
Cheers,
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Thomas Zimmermann" <tzimmermann@suse.de>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"Michal Suchánek" <msuchanek@suse.de>
Cc: Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
Sam Ravnborg <sam@ravnborg.org>, David Airlie <airlied@linux.ie>,
Helge Deller <deller@gmx.de>,
Javier Martinez Canillas <javierm@redhat.com>,
DRI Development <dri-devel@lists.freedesktop.org>,
Paul Mackerras <paulus@samba.org>,
Maxime Ripard <maxime@cerno.tech>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH 2/2] drm/tiny: Add ofdrm for Open Firmware framebuffers
Date: Fri, 27 May 2022 10:17:50 +1000 [thread overview]
Message-ID: <23740c1edd7b080133ab852cd8e3de89fd7c9aae.camel@kernel.crashing.org> (raw)
In-Reply-To: <a077bc25-03b3-f8bd-0138-a175a2864943@suse.de>
On Wed, 2022-05-25 at 18:45 +0200, Thomas Zimmermann wrote:
>
> > The palette handling is useful when using a real Open Firmware
> > implementation which tends to boot in 8-bit mode, so without palette
> > things will look ... bad.
> >
> > It's not necessary when using 16/32 bpp framebuffers which is typically
> > ... what BootX provides :-)
>
> Maybe the odd color formats can be tested via qemu.
>
> I don't mind adding DRM support for BootX displays, but getting the
> necessary test HW with a suitable Linux seems to be laborious. Would a
> G4 Powerbook work?
My point was that it's the non-BootX case that cares about the palette
hacks :-)
Cheers,
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Thomas Zimmermann" <tzimmermann@suse.de>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"Michal Suchánek" <msuchanek@suse.de>
Cc: Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
David Airlie <airlied@linux.ie>,
Michael Ellerman <mpe@ellerman.id.au>,
Helge Deller <deller@gmx.de>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Javier Martinez Canillas <javierm@redhat.com>,
DRI Development <dri-devel@lists.freedesktop.org>,
Paul Mackerras <paulus@samba.org>,
Maxime Ripard <maxime@cerno.tech>,
Sam Ravnborg <sam@ravnborg.org>
Subject: Re: [PATCH 2/2] drm/tiny: Add ofdrm for Open Firmware framebuffers
Date: Fri, 27 May 2022 10:17:50 +1000 [thread overview]
Message-ID: <23740c1edd7b080133ab852cd8e3de89fd7c9aae.camel@kernel.crashing.org> (raw)
In-Reply-To: <a077bc25-03b3-f8bd-0138-a175a2864943@suse.de>
On Wed, 2022-05-25 at 18:45 +0200, Thomas Zimmermann wrote:
>
> > The palette handling is useful when using a real Open Firmware
> > implementation which tends to boot in 8-bit mode, so without palette
> > things will look ... bad.
> >
> > It's not necessary when using 16/32 bpp framebuffers which is typically
> > ... what BootX provides :-)
>
> Maybe the odd color formats can be tested via qemu.
>
> I don't mind adding DRM support for BootX displays, but getting the
> necessary test HW with a suitable Linux seems to be laborious. Would a
> G4 Powerbook work?
My point was that it's the non-BootX case that cares about the palette
hacks :-)
Cheers,
Ben.
next prev parent reply other threads:[~2022-05-27 0:21 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-18 18:30 [PATCH 0/2] drm: Add driverof PowerPC OF displays Thomas Zimmermann
2022-05-18 18:30 ` Thomas Zimmermann
2022-05-18 18:30 ` [PATCH 1/2] MAINTAINERS: Broaden scope of simpledrm entry Thomas Zimmermann
2022-05-18 18:30 ` Thomas Zimmermann
2022-05-20 5:18 ` Javier Martinez Canillas
2022-05-20 5:18 ` Javier Martinez Canillas
2022-05-18 18:30 ` [PATCH 2/2] drm/tiny: Add ofdrm for Open Firmware framebuffers Thomas Zimmermann
2022-05-18 18:30 ` Thomas Zimmermann
2022-05-18 18:51 ` Michal Suchánek
2022-05-18 18:51 ` Michal Suchánek
2022-05-18 18:51 ` Michal Suchánek
2022-05-19 7:11 ` Geert Uytterhoeven
2022-05-19 7:11 ` Geert Uytterhoeven
2022-05-19 7:11 ` Geert Uytterhoeven
2022-05-19 7:27 ` Thomas Zimmermann
2022-05-19 7:27 ` Thomas Zimmermann
2022-05-19 7:27 ` Thomas Zimmermann
2022-05-21 2:49 ` Benjamin Herrenschmidt
2022-05-21 2:49 ` Benjamin Herrenschmidt
2022-05-21 2:49 ` Benjamin Herrenschmidt
2022-05-25 16:45 ` Thomas Zimmermann
2022-05-25 16:45 ` Thomas Zimmermann
2022-05-25 16:45 ` Thomas Zimmermann
2022-05-27 0:17 ` Benjamin Herrenschmidt [this message]
2022-05-27 0:17 ` Benjamin Herrenschmidt
2022-05-27 0:17 ` Benjamin Herrenschmidt
2022-05-27 0:19 ` Benjamin Herrenschmidt
2022-05-27 0:19 ` Benjamin Herrenschmidt
2022-05-27 0:19 ` Benjamin Herrenschmidt
2022-05-21 1:35 ` Benjamin Herrenschmidt
2022-05-21 1:35 ` Benjamin Herrenschmidt
2022-05-21 1:35 ` Benjamin Herrenschmidt
2022-05-18 21:11 ` Mark Cave-Ayland
2022-05-19 6:34 ` Michal Suchánek
2022-05-19 6:34 ` Michal Suchánek
2022-05-19 6:34 ` Michal Suchánek
2022-05-19 7:39 ` Thomas Zimmermann
2022-05-20 6:19 ` Javier Martinez Canillas
2022-05-20 6:19 ` Javier Martinez Canillas
2022-05-22 19:35 ` Thomas Zimmermann
2022-05-22 19:35 ` Thomas Zimmermann
2022-05-25 3:15 ` Benjamin Herrenschmidt
2022-05-25 3:15 ` Benjamin Herrenschmidt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=23740c1edd7b080133ab852cd8e3de89fd7c9aae.camel@kernel.crashing.org \
--to=benh@kernel.crashing.org \
--cc=airlied@linux.ie \
--cc=deller@gmx.de \
--cc=dri-devel@lists.freedesktop.org \
--cc=geert@linux-m68k.org \
--cc=javierm@redhat.com \
--cc=linux-fbdev@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=maxime@cerno.tech \
--cc=mpe@ellerman.id.au \
--cc=msuchanek@suse.de \
--cc=paulus@samba.org \
--cc=sam@ravnborg.org \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.